Powder dredging valve

Abstract

The powder dredging valve comprises a valve body connected with a stock bin shell through a connecting piece, an energy storage device is arranged on the left side of the valve body in a communicating mode, and a pressure release valve is arranged below the valve body in a communicating mode; a valve cover connected with the valve port is arranged in the valve body in a sliding mode, and a thin film which drives the valve cover to move downwards and controls the valve port to be opened after pressure relief of the pressure relief valve is installed in the valve body. A gas source connector is arranged on a valve body passage communicated with the energy storage device, and a gas source conveying pipeline for conveying gas into the energy storage device is mounted at the gas source connector; an exhaust port is formed in a valve body passage opposite to the air source interface, the exhaust port is communicated with an air cylinder through a control air pipe, and the air cylinder is connected with a pressure release valve and controls the pressure release valve to be opened; a nozzle matched with the energy storage device to blow away blocked materials is formed in the connecting piece extending into the material bin shell; the energy storage device communicated with the valve body is matched with the pressure release valve, air is introduced into the stock bin at a certain frequency, blocked materials are dredged, and the blanking efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a powder dredging valve. Background Art

[0002] During the powder conveying process, due to the excessive viscosity of the powder, the material is easy to be blocked, retained, stuck, and arched in the silo during the production process, resulting in problems such as material jamming and sticking. The material is not smoothly discharged, resulting in reduced discharge efficiency.

[0003] At present, in order to solve the above problems, air hammers are usually used to hit the outer wall of the silo or holes are opened on the silo wall and air discs are installed on the inner wall of the silo to assist in material dropping. The air hammer cannot directly act on the material inside the silo, and the effect is not very good. Moreover, hammering the outer wall of the silo can easily cause the silo to deform or damage, which is not conducive to material dropping. The air disc combines the dual effects of vibration flow assistance and jet flow assistance. It uses compressed air to spray along the silo wall and generate high-frequency vibration at the same time, which can effectively promote the flow of powder materials in the silo. However, the air disc is mainly suitable for some dry bulk materials with low blockage. For materials with high viscosity, high specific gravity or serious blockage inside the silo, the impact force of the air disc is limited, and it cannot effectively solve the problems of material blockage, sticking to the silo, and arching caused by the high viscosity of the powder material, and improve the efficiency of powder dropping. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a powder dredging valve, which can solve the problems of material blockage, bin sticking, arching, etc. caused by the high viscosity of powder materials, and improve the powder discharge efficiency.

[0005] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

[0006] A powder unblocking valve comprises a valve body connected to a silo shell through a connecting piece, an energy accumulator is connected to the left side of the valve body, and a pressure relief valve is connected to the bottom of the valve body; a valve cover connected to the valve port is slidably arranged inside the valve body, and a film is installed in the valve body to drive the valve cover to move downward to open the valve port after the pressure relief valve releases pressure; an air source interface is arranged on the valve body passage connected to the energy accumulator, and an air source delivery pipeline for delivering gas to the energy accumulator is installed at the air source interface; an exhaust port is arranged on the valve body passage opposite to the air source interface, and the exhaust port is connected to the cylinder through a control air pipe, and the cylinder is connected to the pressure relief valve and controls the pressure relief valve to open; a nozzle is provided on the connecting piece extending into the silo shell to cooperate with the energy accumulator to blow away the blocked material.

[0007] The above-mentioned powder dredging valve has a cylinder piston moving block slidingly arranged inside the cylinder, a ejector pin is connected to the center of the right side of the cylinder piston moving block, a compression spring is sleeved on the outer peripheral side of the ejector pin, one end of the compression spring is connected to the right end of the cylinder piston moving block, and the other end is connected to the right inner wall of the cylinder.

[0008] The above-mentioned powder dredging valve has a pressure relief valve core arranged inside the pressure relief valve, and the left side of the pressure relief valve core is connected to the ejector pin inside the cylinder; the right side of the pressure relief valve core is connected to the valve core return spring driving the pressure relief valve core to reset, and the other end of the valve core return spring is connected to the inner wall of the pressure relief valve.

[0009] The above-mentioned powder dredging valve, the valve cover is arranged at the center of the top end surface of the film.

[0010] The above-mentioned powder dredging valve, the gas source delivery pipeline is also provided with a speed regulating valve for adjusting the gas flow rate to control the energy storage efficiency of the energy accumulator and the pressure relief frequency of the pressure relief valve.

[0011] In the powder dredging valve, a valve cover return spring is arranged at the bottom of the film, and the bottom end of the valve cover return spring is connected to the inner bottom wall of the valve body.

[0012] In the above-mentioned powder dredging valve, the film divides the inner cavity of the valve body into an upper cavity and a lower cavity, and the upper cavity and the lower cavity are connected through a capillary arranged on the side wall of the valve body to balance the pressure between the upper and lower parts of the film.

[0013] In the above-mentioned powder dredging valve, the film is located below the valve body passage connected to the energy accumulator.

[0014] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows.

[0015] The present invention provides a powder dredging valve, which cooperates with an energy storage device and a pressure relief valve connected to the valve body to ventilate the interior of the silo at a certain frequency to dredge blocked materials, thereby improving the material discharge efficiency. In addition, the present application only realizes pressure relief and dredges the materials through air circuit control, without the need for circuit control, and is simple to operate, not subject to environmental restrictions, and can also save electricity resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the specific structure of the present invention.

[0017] Among them: 1. accumulator, 2. control air pipe, 3. cylinder, 4. cylinder piston moving block, 5. compression spring, 6. ejector pin, 7. pressure relief valve, 8. pressure relief valve core, 9. valve core return spring, 10. capillary, 11. film, 12. valve cover, 13. valve body, 14. connector, 15. silo shell, 16. nozzle, 17. air source delivery pipeline, 18. speed control valve, 19. valve cover return spring, 20. upper chamber, 21. lower chamber. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Powder dredge valve, such as Figure 1As shown, it includes a valve body 13 connected to a silo shell 15 through a connecting piece 14, a valve cover 12 connected to the valve port is slidably arranged inside the valve body 13, a film 11 is installed in the valve body 13 to drive the valve cover 12 to move up and down to control the opening and closing of the valve port, the valve cover 12 is arranged at the center of the top end surface of the film 11, a valve cover return spring 19 is arranged at the bottom of the film 11, and the bottom end of the valve cover return spring 19 is connected to the inner bottom wall of the valve body 13.

[0020] The film 11 divides the inner cavity of the valve body 13 into an upper cavity 20 and a lower cavity 21 . The upper cavity 20 and the lower cavity 21 are connected via a capillary 10 arranged on the side wall of the valve body 13 . The capillary 10 keeps the pressure between the upper cavity 20 and the lower cavity 21 balanced.

[0021] The left side of the valve body 13 is connected with the energy accumulator 1, and a gas source interface is provided on the valve body passage connected with the energy accumulator 1, and a gas source delivery pipeline 17 is installed at the gas source interface.

[0022] The gas source delivery pipeline 17 is also provided with a speed regulating valve 18 for regulating the gas flow rate. By regulating the gas flow rate, the energy storage speed of the energy accumulator 1 can be adjusted.

[0023] The film 11 is located below the valve body passage connected to the energy accumulator 1 , so that the energy accumulator 1 can blow air into the silo through the valve body 13 .

[0024] An exhaust port is provided on the valve body passage opposite to the air source interface, and the exhaust port is communicated with the cylinder 3 through the control air pipe 2.

[0025] The control air pipe 2 is connected to the accumulator 1, and the pressure in the control air pipe 2 is the same as the pressure in the accumulator 1. When the pressure in the accumulator 1 reaches a certain value, the cylinder 3 will be pushed to move.

[0026] A cylinder piston moving block 4 is slidably arranged inside the cylinder 3, a ejector pin 6 is connected to the center of the right side of the cylinder piston moving block 4, a compression spring 5 is sleeved on the outer peripheral side of the ejector pin 6, one end of the compression spring 5 is connected to the right end of the cylinder piston moving block 4, and the other end is connected to the right inner wall of the cylinder 3.

[0027] A pressure relief valve 7 communicating with the lower chamber 21 is provided below the valve body 13 . The pressure relief valve 7 is connected to the cylinder 3 on the left side, and the opening and closing of the pressure relief valve 7 is controlled by the cylinder 3 .

[0028] A pressure relief valve core 8 is arranged inside the pressure relief valve 7 , and the left side of the pressure relief valve core 8 is connected to the ejector pin 6 inside the cylinder 3 .

[0029] The right side of the pressure relief valve core 8 is connected to the valve core return spring 9, and the other end of the valve core return spring 9 is connected to the inner wall of the pressure relief valve 7, so as to drive the pressure relief valve core 8 to reset after pressure relief.

[0030] A nozzle 16 for blowing away the blocked material is provided on the connecting piece 14 extending into the silo shell 15. The nozzle 16 is arranged on the peripheral side of the top end of the connecting piece 14 and is inclined at a certain angle to blow air to clear the material, and at the same time blow off the powder material adhering to the inner wall of the silo; the nozzle 16 can also be arranged on the top end surface of the connecting piece 14 to blow air vertically to the material to clear the blocked material.

[0031] When in use, the valve port on the valve body 13 is in a closed state, the pressures of the upper chamber 20 and the lower chamber 21 on the film 11 are relatively balanced, and gas is transported into the accumulator 1 through the gas source delivery pipeline 17 .

[0032] When delivering gas, the flow rate of the gas can be controlled by adjusting the speed regulating valve 18, thereby controlling the energy storage speed entering the energy accumulator 1, and adjusting the pressure relief frequency of the pressure relief valve 7 according to the energy storage speed of the energy accumulator 1.

[0033] When the internal pressure of the accumulator 1 reaches a certain value, the accumulator 1 starts to release the stored energy pressure. The equal pressure inside the control air pipe 2 will push the cylinder piston moving block 4 in the cylinder 3 to move, and compress the compression spring 5 to move the ejector pin to the right to push the pressure relief valve core 8 inside the pressure relief valve 7 to the right, thereby opening the pressure relief valve 7 to complete the pressure relief of the lower chamber 21.

[0034] After the lower chamber 21 is depressurized, the pressure on the upper part of the film 11 is greater than the pressure on the lower part, the film 11 moves downward, and drives the valve cover 12 to move downward to open the valve port of the valve body 13. At the same time, the gas inside the accumulator 1 flows through the upper chamber 20 of the valve body 13 and is released into the silo, and the blocked material is blown away and cleared through the nozzle 16 on the connecting piece 14.

[0035] After a round of energy storage release, the force pushing the cylinder piston moving block 4 to move rightward gradually decreases and disappears, and the cylinder piston moving block 4 moves leftward and resets under the drive of the compression spring 5, the pressure relief valve 7 is closed, and the energy accumulator 1 starts to store energy again.

[0036] At the same time, the valve cover 12 is reset under the drive of the valve cover return spring 19. At this time, the pressures applied to the film 11 by the upper chamber 20 and the lower chamber 21 are not the same. The gas inside the upper chamber 20 flows into the lower chamber 21 through the capillary 10, so that the pressures applied to the film 11 by the upper chamber 20 and the lower chamber 21 are balanced, thereby ensuring the airtightness of the valve port inside the valve body 13.

[0037] The present invention provides a powder dredging valve, which cooperates with an energy storage device and a pressure relief valve connected to the valve body to ventilate the interior of the silo at a certain frequency to dredge blocked materials, thereby improving the material discharge efficiency. In addition, the present application only realizes pressure relief and dredges the materials through air circuit control, without the need for circuit control, and is simple to operate, not subject to environmental restrictions, and can also save electricity resources.

[0038] In addition, the present invention is also suitable for hazardous areas where dust is prone to explosion. Inert gas is introduced into the equipment through a gas supply pipeline. No electricity is required during operation, which solves the problem of ignition source among the five elements that constitute explosion conditions. It avoids explosion caused by direct contact between the ignition source and combustible dust, achieves inherent safety, and effectively improves and enhances safe production.

Claims

1. Powder dredging valve, characterized by: The invention comprises a valve body (13) connected to a silo housing (15) via a connecting piece (14); an accumulator (1) is arranged on the left side of the valve body (13); a pressure relief valve (7) is arranged below the valve body (13); a valve cover (12) connected to a valve port is slidably arranged inside the valve body (13); a film (11) is installed inside the valve body (13) to drive the valve cover (12) to move downward to open the valve port after the pressure relief valve (7) releases pressure; the valve cover (12) is arranged at the center of the top end surface of the film (11); A gas source interface is provided on the valve body passage connected to the energy accumulator (1), and a gas source delivery pipeline (17) for delivering gas to the energy accumulator (1) is installed at the gas source interface; an exhaust port is provided on the valve body passage opposite to the gas source interface, and the exhaust port is connected to the cylinder (3) through a control air pipe (2), and the cylinder (3) is connected to the pressure relief valve (7) and controls the pressure relief valve (7) to open; a nozzle (16) is provided on the connecting piece (14) extending into the interior of the silo shell (15) to cooperate with the energy accumulator (1) to blow away the blocked material.

2. The powder dredging valve according to claim 1, characterized in that: A cylinder piston moving block (4) is slidably arranged inside the cylinder (3), a ejector pin (6) is connected to the center of the right side of the cylinder piston moving block (4), a compression spring (5) is sleeved on the outer peripheral side of the ejector pin (6), one end of the compression spring (5) is connected to the right end of the cylinder piston moving block (4), and the other end is connected to the right inner wall of the cylinder (3).

3. The powder dredging valve according to claim 2, characterized in that: A pressure relief valve core (8) is arranged inside the pressure relief valve (7), and the left side of the pressure relief valve core (8) is connected to the ejector pin (6) inside the cylinder (3); the right side of the pressure relief valve core (8) is connected to a valve core return spring (9) for driving the pressure relief valve core (8) to return to its original position, and the other end of the valve core return spring (9) is connected to the inner wall of the pressure relief valve (7).

4. The powder dredging valve according to claim 1, characterized in that: The gas source delivery pipeline (17) is also provided with a speed regulating valve (18) for regulating the gas flow rate so as to control the energy storage efficiency of the energy storage device (1) and the pressure relief frequency of the pressure relief valve (7).

5. The powder dredging valve according to claim 1, characterized in that: A valve cover return spring (19) is arranged at the bottom of the film (11), and the bottom end of the valve cover return spring (19) is connected to the inner bottom wall of the valve body (13).

6. The powder dredging valve according to claim 1, characterized in that: The film (11) divides the inner cavity of the valve body (13) into an upper cavity (20) and a lower cavity (21), and the lower cavity (21) is connected to the pressure relief valve (7); the upper cavity (20) and the lower cavity (21) are connected via a capillary (10) arranged on the side wall of the valve body 13 to balance the pressure between the upper and lower parts of the film (11).

7. The powder dredging valve according to claim 1, characterized in that: The film (11) is located below a valve body passage that is in communication with the energy accumulator (1).

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